JPH02259224A - Exhaust purifying device for internal combustion engine with turbocharger - Google Patents
Exhaust purifying device for internal combustion engine with turbochargerInfo
- Publication number
- JPH02259224A JPH02259224A JP7972489A JP7972489A JPH02259224A JP H02259224 A JPH02259224 A JP H02259224A JP 7972489 A JP7972489 A JP 7972489A JP 7972489 A JP7972489 A JP 7972489A JP H02259224 A JPH02259224 A JP H02259224A
- Authority
- JP
- Japan
- Prior art keywords
- passage
- exhaust
- turbocharger
- turbine
- end side
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 30
- 239000003054 catalyst Substances 0.000 claims abstract description 34
- 239000002699 waste material Substances 0.000 claims abstract description 14
- 238000000746 purification Methods 0.000 claims description 37
- 238000011144 upstream manufacturing Methods 0.000 description 8
- 239000000446 fuel Substances 0.000 description 6
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明はターボチャージャ付内燃機関の排気浄化装置
に係り、特に既存の通路や装置と別途に新たな通路や装
置の追加付設を要することなく排気浄化装置を構成し得
て、これにより小型化を図り得てコスト低減を果たし得
るターボチャージャ付内燃機関の排気浄化装置に関する
。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an exhaust gas purification device for a turbocharged internal combustion engine, and in particular, it does not require the installation of new passages or devices in addition to existing passages or devices. The present invention relates to an exhaust gas purification device for an internal combustion engine with a turbocharger, which can be configured as an exhaust gas purification device, thereby achieving downsizing and cost reduction.
排気エネルギを利用して吸気を圧送するターボチャージ
ャを備えたターボチャージャ付内燃機関においては、過
給圧が上昇し過ぎると、ターボチャージャや内燃機関の
損傷を招くことになる。そこで、ターボチャージャ付内
燃機関においては、過給圧が設定値に達した際に、ター
ボチャージャのコンプレッサ下流側の吸気の一部をコン
プレッサ上流側にリリーフさせ、過給圧が設定値を越え
ないように制御するものがある。あるいは、過給圧が設
定値に達した際に、ターボチャージャのタービン上流側
の排気の一部をタービン下流側にバイパスさせ、過給圧
が設定値を越えないように制御するものがある。In a turbocharged internal combustion engine equipped with a turbocharger that pumps intake air using exhaust energy, if the supercharging pressure increases too much, the turbocharger and the internal combustion engine will be damaged. Therefore, in a turbocharged internal combustion engine, when the boost pressure reaches the set value, a portion of the intake air downstream of the turbocharger compressor is relieved to the upstream side of the compressor so that the boost pressure does not exceed the set value. There are things that can be controlled like this. Alternatively, when the boost pressure reaches a set value, a part of the exhaust gas on the upstream side of the turbine of the turbocharger is bypassed to the downstream side of the turbine to control the boost pressure so as not to exceed the set value.
このようなターボチャージャ付内燃機関にあって、排気
中の有害成分を除去するために、触媒物質の作用により
排気中の有害成分を無害な成分に変換する排気浄化装置
を備えたものがある。排気浄化装置としては、実開昭５
６−１６３７１２号公報や実開昭５７−１６７２１３号
公報等に開示のものがある。Some of such turbocharged internal combustion engines are equipped with an exhaust purification device that converts the harmful components in the exhaust gas into harmless components by the action of a catalyst substance in order to remove the harmful components in the exhaust gas. As an exhaust purification device,
Some of these are disclosed in Japanese Utility Model Publication No. 6-163712, Japanese Utility Model Application Publication No. 57-167213, and the like.
実開昭５６−１６３７１２号公報に開示のものは、ター
ボチャージャのコンプレッサ及び吸気絞り弁間の吸気通
路とタービン及び触媒体間の排気通路とを連通ずる二次
空気通路を設け、この二次空気通路をアイドリング時、
減速時、あるいは低速低負荷時に開放する流量制御装置
を設けたものである。The device disclosed in Japanese Utility Model Application Publication No. 56-163712 provides a secondary air passage that communicates the intake passage between the compressor and the intake throttle valve of the turbocharger with the exhaust passage between the turbine and the catalyst body, and this secondary air When idling in the aisle,
It is equipped with a flow control device that opens during deceleration or low speed and low load.
また、実開昭５７−１６７２１３号公報に開示のものは
、第３図に示す如く、内燃機関１０２の吸気通路１０４
に燃料噴射弁１０６を設けるとともに排気通路１０日に
触媒体１１０を設け、車速センサ１１２からの信号によ
り設定車速に達した際に燃料噴射弁１０６の供給する燃
料を停止して車速を制限する最高速制限装置１１４を設
け、前記触媒体１１０を迂回して排気通路１０８を連通
するバイパス通路１１６を設け、このバイパス通路１１
６を前記最高速制限装置１１４による最高速制限時に開
放する弁装置１１８を設けたものである。Further, as shown in FIG.
A fuel injection valve 106 is provided in the exhaust passage 10, and a catalyst body 110 is provided in the exhaust passage 10, and when a set vehicle speed is reached based on a signal from the vehicle speed sensor 112, the fuel supplied by the fuel injection valve 106 is stopped to limit the vehicle speed. A high-speed restriction device 114 is provided, a bypass passage 116 is provided that bypasses the catalyst body 110 and communicates with the exhaust passage 108, and this bypass passage 11
6 is provided with a valve device 118 that opens when the maximum speed is limited by the maximum speed limiter 114.
ところが、前記従来の排気浄化装置は、既存の通路と別
途に新たな通路として内燃機関を迂回する二次空気通路
や触媒体を迂回するバイパス通路を設け、また、既存の
装置と別途に新たな装置として流量制御装置や車速セン
サ・弁装置等を設けていることにより、別途に新たな配
管スペースや配置スペースを確保しなければならない問
題がある。このため、通路や装置の追加付設による大形
化を招く不都合があるとともにコストの上昇を招く不都
合があった。However, the conventional exhaust purification device has a secondary air passage that bypasses the internal combustion engine and a bypass passage that bypasses the catalyst body as a new passage separately from the existing passage, and also has a new passage that is separate from the existing passage. Since a flow rate control device, a vehicle speed sensor, a valve device, etc. are provided as devices, there is a problem in that new piping space and arrangement space must be secured separately. For this reason, there is an inconvenience that the size is increased due to the additional installation of passages and devices, and there is an inconvenience that this increases the cost.
そこで、この発明の目的は、既存の通路や装置と別途に
新たな通路や装置の追加付設を要することなく排気浄化
装置を構成し得て、これにより小型化を図り得てコスト
低減を果たし得るターボチャージャ付内燃機関の排気浄
化装置を実現することにある。Therefore, an object of the present invention is to configure an exhaust purification device without requiring the addition of new passages or devices in addition to existing passages or devices, thereby achieving miniaturization and cost reduction. The object of the present invention is to realize an exhaust purification device for an internal combustion engine with a turbocharger.
この目的を達成するためにこの発明は、ターボチャージ
ャのタービンを迂回して排気通路を連通ずるバイパス通
路を設けるとともにこのバイパス通路に過給圧を制御す
べく開閉動作されるウェイストゲート弁を設けたターボ
チャージャ付内燃機関において、前記タービンの出口に
始端側を連通ずる第１通路とこの第１通路の終端側に始
端側を連通ずるとともにこの第１通路の外周を通り前記
ウェイストゲート弁下流側のバイパス通路に終端側を連
通ずる断面環筒状の第２通路とからなる排気浄化通路を
設け、この排気浄化通路の前記第２通路に触媒体を設け
たことを特徴とする。In order to achieve this object, the present invention provides a bypass passage that bypasses the turbine of the turbocharger and communicates with the exhaust passage, and also provides a wastegate valve that is opened and closed to control the boost pressure in the bypass passage. In an internal combustion engine with a turbocharger, a first passage whose starting end side communicates with the outlet of the turbine, a starting end side which communicates with the terminal end side of the first passage, and a downstream side of the waste gate valve that passes through the outer periphery of the first passage. The present invention is characterized in that an exhaust purification passage including a second passage having an annular cylindrical cross section and communicating with the bypass passage at its terminal end is provided, and a catalyst body is provided in the second passage of the exhaust purification passage.
この発明の構成によれば、タービンの出口に始端側を連
通ずる第１通路とこの第１通路の終端側に始端側を連通
ずるとともにこの第１通路の外周を通りウェイストゲー
ト弁下流側のバイパス通路に終端側を連通ずる断面環筒
状の第２通路とからなる排気浄化通路の前記第２通路に
触媒体を設けたことによって、既存の通路や装置と別途
に新たな通路や装置の追加付設を要せず、従って、別途
に新たな配管スペースや配置スペースを確保する必要が
ない。According to the configuration of the present invention, the first passage communicates the starting end side with the outlet of the turbine, the starting end side communicates with the terminal end side of the first passage, and the bypass passes through the outer periphery of the first passage and is downstream of the waste gate valve. By providing a catalyst body in the second passage of the exhaust purification passage, which is composed of a second passage with an annular cylindrical cross section that communicates with the passage at its terminal end, new passages and devices can be added separately from the existing passages and devices. No additional installation is required, so there is no need to separately secure new piping space or arrangement space.
以下図面に基づいてこの発明の実施例を詳細に説明する
。Embodiments of the present invention will be described in detail below based on the drawings.
第１・２図は、この発明の実施例を示すものである。第
１図において、２はターボチャージャ付内燃機関、４は
吸気管、６は排気管、８はターボチャージャである。1 and 2 show an embodiment of the invention. In FIG. 1, 2 is an internal combustion engine with a turbocharger, 4 is an intake pipe, 6 is an exhaust pipe, and 8 is a turbocharger.
ターボチャージャ付内燃機関２の燃焼室１０には、吸気
管４により吸気通路１２が連通されているとともに、排
気管６により排気通路１４が連通されている。前記ター
ボチャージャ８は、吸気通路１２に臨ませて設けたコン
プレフサ１６を排気通路１４に臨ませて設けたタービン
１８により回転させ、吸気を圧送する。なお、符号２０
は点火プラグである。An intake passage 12 is communicated with a combustion chamber 10 of the turbocharged internal combustion engine 2 through an intake pipe 4, and an exhaust passage 14 is communicated with an exhaust pipe 6. The turbocharger 8 rotates a compressor 16 provided facing the intake passage 12 by a turbine 18 provided facing the exhaust passage 14, and pumps intake air. In addition, the code 20
is a spark plug.
前記コンプレッサ１６の上流側の吸気通路１２である第
１吸気通路１２−１は、始端側をエアクリーナ２２に連
通ずるとともに終端側をコンプレッサ１６の入口２４に
連通し、途中にエアフローメータ２６を設けている。ま
た、コンプレッサ１６の下流側の吸気通路１２である第
２吸気通路１２−２は、始端側をコンプレッサ１６の出
口２８に連通するとともに終端側をターボチャージャ付
内燃機関２の燃焼室１０に連通し、途中に吸気絞り弁３
０を設けるとともに燃焼室１ｏに指向させて燃料噴射弁
３２を設けている。The first intake passage 12-1, which is the intake passage 12 on the upstream side of the compressor 16, has a starting end communicating with the air cleaner 22, a terminal end communicating with the inlet 24 of the compressor 16, and an air flow meter 26 provided in the middle. There is. Further, the second intake passage 12 - 2 , which is the intake passage 12 on the downstream side of the compressor 16 , has a starting end communicating with the outlet 28 of the compressor 16 and a terminal end communicating with the combustion chamber 10 of the turbocharged internal combustion engine 2 . , Intake throttle valve 3 in the middle
0 is provided, and a fuel injection valve 32 is provided so as to be oriented toward the combustion chamber 1o.
前記タービン１８の上流側の排気通路１４である第１排
気通路１４−１は、始端側をターボチャージャ付内燃機
関２の燃焼室１０に連通ずるとともに終端側をタービン
１８の入口３４に連通している。また、タービン１８の
下流側の排気通路１４である第２排気通路１４−２は、
始端側をタービン１８の出口３６に連通ずるとともに終
端側を外気に開放し、途中にマフラ３８を設けている。The first exhaust passage 14-1, which is the exhaust passage 14 on the upstream side of the turbine 18, has a starting end communicating with the combustion chamber 10 of the turbocharged internal combustion engine 2, and a terminal end communicating with the inlet 34 of the turbine 18. There is. Further, the second exhaust passage 14-2, which is the exhaust passage 14 on the downstream side of the turbine 18, is
The starting end side is communicated with the outlet 36 of the turbine 18, and the terminal end side is open to the outside air, and a muffler 38 is provided in the middle.
前記ターボチャージャ８のタービン１８を迂回して、第
１排気通路１４−１と第２排気通路１４−２とを連通ず
るバイパス通路４０を設ける。バイパス通路４０は、タ
ービン１８の上流側の第１排気通路１４−１に設けた入
口４２に始端側を連通させ、タービン１８の下流側の第
２排気通路１４−２に設けた出口４４に終端側を連通さ
せて設ける。このバイパス通路４０には、過給圧を制御
すべく開閉動作されるウェイストゲート弁４６を設けて
いる。ウェイストゲート弁４６は、第１排気通路１４−
１の入口４２に設けられている。A bypass passage 40 is provided that bypasses the turbine 18 of the turbocharger 8 and communicates the first exhaust passage 14-1 and the second exhaust passage 14-2. The bypass passage 40 has a starting end communicating with an inlet 42 provided in a first exhaust passage 14-1 on the upstream side of the turbine 18, and a terminal end communicating with an outlet 44 provided in a second exhaust passage 14-2 on the downstream side of the turbine 18. Provided with the sides communicating. This bypass passage 40 is provided with a wastegate valve 46 that is opened and closed to control the supercharging pressure. The waste gate valve 46 is connected to the first exhaust passage 14-
It is provided at the entrance 42 of 1.
ウェイストゲート弁４４は、アクチュエータ４８により
開閉動作される。アクチュエータ４８は、本体５０内に
ダイヤフラム５２により圧力室５４を区画形成している
。ダイヤフラム５２は、ロフト５６により前記ウェイス
トゲート弁４６に連絡されている。前記圧力室５４は、
導圧管５８の導圧通路６０によりコンプレッサ１６下流
側の第２吸気通路１．２−２に連通されている。また、
ダイヤフラム５２には、圧力室５４を縮小する方向に付
勢するバネ６２を弾圧して設けている。The wastegate valve 44 is opened and closed by an actuator 48. The actuator 48 has a pressure chamber 54 defined within the main body 50 by a diaphragm 52 . Diaphragm 52 is connected to the wastegate valve 46 by a loft 56. The pressure chamber 54 is
The pressure guiding passage 60 of the pressure guiding pipe 58 communicates with the second intake passage 1.2-2 on the downstream side of the compressor 16. Also,
The diaphragm 52 is provided with a biasing spring 62 that biases the pressure chamber 54 in a direction to contract it.
これにより、アクチュエータ４８は、圧力室５４に作用
する過給圧とバネ６２の付勢力とによりロフト５６を押
進・引退勤させ、このロッド５６の押進・引退勤により
ウェイストゲート弁４４を開閉動作させて排気の一部を
バイパスさせ、過給圧を設定値に制御する。Thereby, the actuator 48 pushes and retires the loft 56 by the supercharging pressure acting on the pressure chamber 54 and the biasing force of the spring 62, and opens and closes the waste gate valve 44 by pushing and retiring the rod 56. It operates to bypass part of the exhaust gas and control the boost pressure to the set value.
このターボチャージャ付内燃機関２には、排気中の有害
成分を除去するために、排気浄化装置６４を設けている
。排気浄化装置６４は、排気浄化通路６６を設けている
。排気浄化通路６６は、前記タービン１８の出口３６に
始端側を連通ずる第１通路６６−１とこの第１通路６６
−１の終端側に始端側を連通ずるとともにこの第１通路
６６−１の外周を通り前記ウェイストゲート弁４６下流
側のバイパス通路４０に終端側を連通ずる断面環筒状の
第２通路６６−２とからなり、この排気浄化通路６６の
前記第２通路６６−２に断面環筒状の触媒体６８を設け
ている。This turbocharged internal combustion engine 2 is provided with an exhaust gas purification device 64 in order to remove harmful components from the exhaust gas. The exhaust purification device 64 is provided with an exhaust purification passage 66. The exhaust purification passage 66 includes a first passage 66 - 1 whose starting end side communicates with the outlet 36 of the turbine 18 and this first passage 66 .
- A second passage 66-1 having an annular cylindrical cross section, whose starting end communicates with the terminal end of the first passage 66-1, and whose terminal end communicates with the bypass passage 40 on the downstream side of the waste gate valve 46 through the outer periphery of the first passage 66-1. 2, and a catalyst body 68 having an annular cylindrical cross section is provided in the second passage 66-2 of this exhaust purification passage 66.
即ち、排気浄化装置６４は、第２図に示す如く、基体７
０及び蓋体７２と内筒７４及び外筒７６とを有している
。基体７０には、タービン１８の上流側の第１排気通路
１４−１に設けた入口４２に連通ずるとともにタービン
１８の下流側の第２排気通路１４−２に設けた出口４４
に連通ずるバイパス通路４０が形成されている。また、
この基体７０には、第１通路６６−１の一部が形成され
ているとともに、この第１通路６６−１の外周にウェイ
ストゲート弁４６下流側のバイパス通路４０に終端側を
連通ずる断面環筒状の第２通路６６−２の一部が形成さ
れている。That is, the exhaust purification device 64 has a base body 7 as shown in FIG.
0, a lid body 72, an inner cylinder 74, and an outer cylinder 76. The base body 70 has an outlet 44 that communicates with an inlet 42 provided in a first exhaust passage 14 - 1 on the upstream side of the turbine 18 and an outlet 44 provided in a second exhaust passage 14 - 2 on the downstream side of the turbine 18 .
A bypass passage 40 is formed which communicates with the. Also,
A part of the first passage 66-1 is formed in the base body 70, and a cross-sectional ring whose terminal end communicates with the bypass passage 40 on the downstream side of the waste gate valve 46 is formed on the outer periphery of the first passage 66-1. A part of the cylindrical second passage 66-2 is formed.
前記内筒７４は、一端側を溶接等により前記基体７０に
固定されて第１通路６６−１の残部を形成するとともに
、他端側を開放端としている。また、前記外筒７６は、
この内筒７４を包囲して一端側を溶接等により前記基体
７０に固定されて第２通路６６−２の残部を形成すると
ともに、他端側を溶接等により前記蓋体７２に固定され
て第２通路６６−２の始端側を第１通路６６−１の終端
側に連通している。この内筒７４の外周と外筒７６の内
周とにより形成される第２通路６６−２には、断面環筒
状の前記触媒体６８を設けている。The inner cylinder 74 has one end fixed to the base body 70 by welding or the like to form the remainder of the first passage 66-1, and the other end is an open end. Further, the outer cylinder 76 is
Surrounding this inner cylinder 74, one end side is fixed to the base body 70 by welding or the like to form the remainder of the second passage 66-2, and the other end side is fixed to the lid body 72 by welding or the like to form the second passage 66-2. The starting end side of the second passage 66-2 is communicated with the terminal end side of the first passage 66-1. A second passage 66-2 formed by the outer periphery of the inner cylinder 74 and the inner periphery of the outer cylinder 76 is provided with the catalyst body 68 having an annular cylindrical cross section.
この触媒体６８は、例えば、耐熱鋼からなる平板と波板
とを重合して渦巻状に捲装することにより多数の排気流
通孔を形成した担体に触媒を担持させて断面環筒状に構
成した金属触媒体である。あるいは、触媒体６８は、多
数の排気流通孔を形成した耐熱性セラミック担体に触媒
を担持させて断面環筒状に構成したセラミック触媒体と
することもできる。The catalyst body 68 is configured to have an annular cylindrical cross section by supporting a catalyst on a carrier in which a large number of exhaust flow holes are formed by, for example, superimposing a flat plate and a corrugated plate made of heat-resistant steel and winding them in a spiral shape. It is a metal catalyst body. Alternatively, the catalyst body 68 may be a ceramic catalyst body having an annular cylindrical cross section by supporting a catalyst on a heat-resistant ceramic carrier in which a large number of exhaust gas flow holes are formed.
このように構成された排気浄化装置６４は、タービン１
８の上流側の第１排気通路１４−１に設けた入口４２に
バイパス通路４０の始端側を連通させて基体７０をター
ボチャージャ８の本体７８にボルト等の固定具８０によ
り固定するとともに、タービン１８の下流側の第２排気
通路１４−２に設けた出口４４にバイパス通路４０の終
端側を連通させて基体７０を排気管６にボルト等の固定
具（図示せず）により固定する。即ち、排気浄化装Ｒ６
２は、ターボチャージャ８に対して固定具８０により着
脱可能となっている。The exhaust gas purification device 64 configured in this way is installed in the turbine 1.
The starting end side of the bypass passage 40 is connected to the inlet 42 provided in the first exhaust passage 14-1 on the upstream side of the turbocharger 8, and the base body 70 is fixed to the main body 78 of the turbocharger 8 with a fixing member 80 such as a bolt. The terminal end side of the bypass passage 40 is communicated with the outlet 44 provided in the second exhaust passage 14-2 on the downstream side of the exhaust pipe 18, and the base body 70 is fixed to the exhaust pipe 6 with a fixing device such as a bolt (not shown). That is, exhaust purification system R6
2 can be attached to and detached from the turbocharger 8 using a fixture 80.
これにより、排気浄化装置６４は、タービン１８の出口
３６に始端側を連通ずる第１通路６６−１とこの第１通
路６６−１の終端側に始端側を連通ずるとともにこの第
１通路６６−１の外周を通り前記ウェイストゲート弁４
６下流側のバイパス通路４０に終端側を連通ずる断面環
筒状の第２通路６６−２とからなる排気浄化通路６６を
設け、この排気浄化通路６６の前記第２通路６６−２に
断面環筒状の触媒体６８を設けている。As a result, the exhaust purification device 64 has a first passage 66-1 whose starting end side communicates with the outlet 36 of the turbine 18, a starting end side which communicates with the terminal end side of this first passage 66-1, and this first passage 66-1. 1 through the outer periphery of the wastegate valve 4
6. An exhaust purification passage 66 consisting of a second passage 66-2 having an annular cylindrical cross section and communicating with the downstream side bypass passage 40 is provided. A cylindrical catalyst body 68 is provided.
次に作用を説明する。Next, the action will be explained.
ターボチャージャ付内燃機関２のエアクリーナ２２から
第１吸気通路１２−１に取入れられた空気は、エアフロ
ーメータ２６により空気量を検出され、ターボチャージ
ャ８のコンプレッサ１６の回転により第２吸気通路１２
−２に圧送され、吸気絞り弁３０により調量され、燃料
噴射弁３２から噴射される燃料とともに燃焼室１０に供
給される。燃焼室１０で燃焼生成された排気は、第１排
気通路１４−１に排出され、入口３４から流入してター
ビン１８を回転させる。The amount of air taken into the first intake passage 12-1 from the air cleaner 22 of the turbocharged internal combustion engine 2 is detected by the air flow meter 26, and the air is transferred to the second intake passage 12 by the rotation of the compressor 16 of the turbocharger 8.
-2, is metered by the intake throttle valve 30, and is supplied to the combustion chamber 10 together with fuel injected from the fuel injection valve 32. Exhaust gas generated by combustion in the combustion chamber 10 is discharged into the first exhaust passage 14-1, flows in from the inlet 34, and rotates the turbine 18.
タービン１８の出口３６から流出する排気は、基体７０
と内筒７４とにより形成される排気浄化通路６６の第１
通路６６−１を通り、蓋体７６内で反転され、内筒７４
の外周と外筒７６の内周とにより形成される第２通路６
６−２を通る間に触媒体６８により浄化され、基体７０
に形成されるウェイストゲート弁４６下流側のバイパス
通路４４に流出する。バイパス通路４４から第２排気通
路１４−２に流出した排気は、マフラ３８を介して外気
に排出される。Exhaust gas exiting the outlet 36 of the turbine 18 is directed to the base 70
The first part of the exhaust purification passage 66 formed by the and inner cylinder 74
Passes through the passage 66-1, is inverted within the lid body 76, and is opened to the inner cylinder 74.
The second passage 6 formed by the outer periphery of and the inner periphery of the outer cylinder 76
The substrate 70 is purified by the catalyst body 68 while passing through the substrate 6-2.
It flows out into the bypass passage 44 on the downstream side of the waste gate valve 46 formed in the waste gate valve 46 . The exhaust gas flowing out from the bypass passage 44 to the second exhaust passage 14-2 is discharged to the outside air via the muffler 38.
このように、タービン１８の出口３６に始端側を連通ず
る第１通路６６−１とこの第１通路６６−１の終端側に
始端側を連通ずるとともにこの第１通路６６−１の外周
を通りウェイストゲート弁４６下流側のバイパス通路４
４に終端側を連通ずる断面環筒状の第２通路６６−２と
からなる排気浄化通路６６を設け、この排気浄化通路６
６の前記第２通路６６−２に触媒体６８を設けたことに
よって、既存の通路や装置と別途に新たな通路や装置の
追加付設を要せず、従って、別途に新たな配管スペース
や配置スペースを確保する必要がな（なる。In this way, the first passage 66-1 communicates the starting end side with the outlet 36 of the turbine 18, and the starting end side communicates with the terminal end side of the first passage 66-1, and passes through the outer periphery of the first passage 66-1. Wastegate valve 46 downstream bypass passage 4
4 is provided with an exhaust purification passage 66 consisting of a second passage 66-2 having an annular cylindrical cross section communicating with the terminal end side, and this exhaust purification passage 6
By providing the catalyst body 68 in the second passage 66-2 of No. 6, there is no need to add a new passage or device in addition to the existing passage or device, and therefore, it is not necessary to additionally install a new piping space or arrangement. There is no need to secure space.
このため、既存の通路や装置と別途に新たな通路や装置
の追加付設を要することなく排気浄化装置６４を構成す
ることができ、これにより小型化を図り得てコスト低減
を果たすことができる。Therefore, the exhaust gas purification device 64 can be constructed without requiring the addition of new passages or devices in addition to existing passages or devices, thereby achieving miniaturization and cost reduction.
また、ターボチャージャ付内燃機関２の高回転・高負荷
時に過給圧が設定値に達すると、アクチュエータ４８に
よりウェイストゲート弁４６が開放動作され、タービン
１８上流側の第１排気通路１４−１の排気の一部をバイ
パス通路４０を介して第２排気通路１４−２にバイパス
させ、過給圧が設定値を越えないように制御する。この
とき、バイパスされる排気は、触媒体６８を通ることな
く第２排気通路１４−２に排出され、触媒体６８により
浄化された排気とともにマフラ３８を介して外気に排出
される。Further, when the supercharging pressure reaches a set value when the turbocharged internal combustion engine 2 is at high speed and under high load, the wastegate valve 46 is opened by the actuator 48, and the first exhaust passage 14-1 on the upstream side of the turbine 18 is opened. A part of the exhaust gas is bypassed to the second exhaust passage 14-2 via the bypass passage 40, and the supercharging pressure is controlled so as not to exceed a set value. At this time, the bypassed exhaust gas is discharged to the second exhaust passage 14-2 without passing through the catalyst body 68, and is discharged to the outside air through the muffler 38 together with the exhaust gas purified by the catalyst body 68.
このように、ウェイストゲート弁４６によりバイパスさ
れる排気が触媒体６８を通ることなく排出されるため、
従来の全量を常に触媒体に通す排気浄化装置と比して高
回転・高負荷時の触媒体の温度を低下させることができ
、これにより触媒体の耐久性を向上することができる。In this way, the exhaust gas that is bypassed by the wastegate valve 46 is discharged without passing through the catalyst body 68.
Compared to conventional exhaust gas purification devices that always pass the entire exhaust gas through the catalyst body, the temperature of the catalyst body during high rotation and high load can be lowered, thereby improving the durability of the catalyst body.
さらに、ウェイストゲート弁４６によりバイパスされる
排気が触媒体６８を通ることなく排出されるため、高回
転・高負荷時の排圧を従来よりも低下させることができ
るので、出力の向上を果たすことができる。Furthermore, since the exhaust gas that is bypassed by the wastegate valve 46 is discharged without passing through the catalyst body 68, the exhaust pressure at high speeds and high loads can be lowered than before, resulting in improved output. I can do it.
このようにこの発明によれば、タービンの出口に始端側
を連通ずる第１通路とこの第１通路の終端側に始端側を
連通ずるとともにこの第１通路の外周を通りウェイスト
ゲート弁下流側のバイパス通路に終端側を連通ずる断面
環筒状の第２通路とからなる排気浄化通路の前記第２通
路に触媒体を設けたことによって、既存の通路や装置と
別途に新たな通路や装置の追加付設を要せず、従って、
別途に新たな配管スペースや配置スペースを確保する必
要がない。As described above, according to the present invention, the first passage communicates the starting end side with the outlet of the turbine, and the starting end side communicates with the terminal end side of the first passage, and passes through the outer periphery of the first passage and connects the downstream side of the waste gate valve. By providing a catalytic body in the second passage of the exhaust purification passage, which consists of a second passage with an annular cylindrical cross section whose terminal end communicates with the bypass passage, it is possible to create a new passage or device separately from the existing passage or device. No additional installation is required, therefore,
There is no need to separately secure new piping space or arrangement space.
これにより、既存の通路や装置と別途に新たな通路や装
置の追加付設を要することなく排気浄化装置を構成し得
るので、小型化を図り得てコスト低減を果たすことがで
きる。また、ウェイストゲート弁によりバイパスされる
排気が触媒体を通ることなく排出されるため、従来の全
量を常に触媒体に通す排気浄化装置と比して高回転・高
負荷時の触媒体の温度を低下させることができ、これに
より触媒体の耐久性を向上することができる。さらに、
ウェイストゲート弁によりバイパスされる排気が触媒体
を通ることなく排出されるため、高回転・高負荷時の排
圧を従来よりも低下させることができるので、出力の向
上を果たすことができる。As a result, the exhaust gas purification device can be configured without requiring the addition of new passages and devices in addition to existing passages and devices, so it is possible to achieve downsizing and cost reduction. In addition, since the exhaust gas bypassed by the wastegate valve is discharged without passing through the catalyst body, the temperature of the catalyst body at high speeds and high loads can be reduced compared to conventional exhaust purification devices that always pass the entire amount through the catalyst body. This can improve the durability of the catalyst. moreover,
Since the exhaust gas that is bypassed by the wastegate valve is discharged without passing through the catalyst body, the exhaust pressure at high speeds and high loads can be lowered than before, and the output can be improved.
第１・２図はこの発明の実施例を示し、第１図はターボ
チャージャ付内燃機関の排気浄化装置の概略説明図、第
２図は排気浄化装置の要部説明図である。
第３図は従来例を示す排気浄化装置の要部説明図である
。
図において、２はターボチャージャ付内燃機関、４は吸
気管、６は排気管、８はターボチャージャ、１０は燃焼
室、１２は吸気通路、１４は排気通路、１６はコンプレ
ッサ、１Ｂはタービン、２４はコンプレッサ１６の入口
、２８はコンプレフサ１６の出口、３０は吸気絞り弁、
３４はタービン１８の入口、３６はタービン１８の出口
、４ｏはバイパス通路、４６はウェイストゲート弁、４
８はアクチュエータ、６４は排気浄化装置、６６は排気
浄化通路、６６−１は第１通路、６６−２は第２通路、
６８は触媒体、７０は基体、７２は蓋体、７４は内筒、
７６は外筒、７８はターボチャージャ８の本体、８０は
固定具である。
第１図
第２図1 and 2 show an embodiment of the present invention, FIG. 1 is a schematic explanatory diagram of an exhaust gas purification device for an internal combustion engine with a turbocharger, and FIG. 2 is a diagram illustrating main parts of the exhaust gas purification device. FIG. 3 is an explanatory diagram of main parts of an exhaust gas purification device showing a conventional example. In the figure, 2 is an internal combustion engine with a turbocharger, 4 is an intake pipe, 6 is an exhaust pipe, 8 is a turbocharger, 10 is a combustion chamber, 12 is an intake passage, 14 is an exhaust passage, 16 is a compressor, 1B is a turbine, 24 is the inlet of the compressor 16, 28 is the outlet of the compressor 16, 30 is the intake throttle valve,
34 is an inlet of the turbine 18, 36 is an outlet of the turbine 18, 4o is a bypass passage, 46 is a waste gate valve, 4
8 is an actuator, 64 is an exhaust purification device, 66 is an exhaust purification passage, 66-1 is a first passage, 66-2 is a second passage,
68 is a catalyst body, 70 is a base body, 72 is a lid body, 74 is an inner cylinder,
76 is an outer cylinder, 78 is a main body of the turbocharger 8, and 80 is a fixture. Figure 1 Figure 2
Claims (1)
連通するバイパス通路を設けるとともにこのバイパス通
路に過給圧を制御すべく開閉動作されるウェイストゲー
ト弁を設けたターボチャージャ付内燃機関において、前
記タービンの出口に始端側を連通する第１通路とこの第
１通路の終端側に始端側を連通するとともにこの第１通
路の外周を通り前記ウェイストゲート弁下流側のバイパ
ス通路に終端側を連通する断面環筒状の第２通路とから
なる排気浄化通路を設け、この排気浄化通路の前記第２
通路に触媒体を設けたことを特徴とするターボチャージ
ャ付内燃機関の排気浄化装置。1. In an internal combustion engine with a turbocharger, which is provided with a bypass passage that bypasses the turbine of the turbocharger and communicates with the exhaust passage, and is provided with a wastegate valve that is opened and closed to control boost pressure in the bypass passage. a first passage whose starting end side communicates with the outlet of the first passage; and a cross section whose starting end side communicates with the terminal end side of the first passage, and which passes through the outer periphery of the first passage and communicates the terminal end side with a bypass passage downstream of the waste gate valve; An exhaust purification passage consisting of a second annular passage is provided, and the second passage of the exhaust purification passage is provided with an annular second passage.
An exhaust purification device for an internal combustion engine with a turbocharger, characterized in that a catalyst body is provided in a passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7972489A JPH02259224A (en) | 1989-03-30 | 1989-03-30 | Exhaust purifying device for internal combustion engine with turbocharger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7972489A JPH02259224A (en) | 1989-03-30 | 1989-03-30 | Exhaust purifying device for internal combustion engine with turbocharger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02259224A true JPH02259224A (en) | 1990-10-22 |
Family
ID=13698148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7972489A Pending JPH02259224A (en) | 1989-03-30 | 1989-03-30 | Exhaust purifying device for internal combustion engine with turbocharger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02259224A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2856735A1 (en) * | 2003-06-30 | 2004-12-31 | Renault Sa | Internal combustion engine for motor vehicle, has turbo compressor with turbine cover having outlet orifice connected to inlet of catalyst, where catalyst and compressor are fixed on cylinder block by main common support |
| EP1686247A1 (en) * | 2004-12-14 | 2006-08-02 | BorgWarner Inc. | Turbocharger-Catalyst-Arrangement |
| US20120291431A1 (en) * | 2011-05-18 | 2012-11-22 | GM Global Technology Operations LLC | Forced induction and exhaust system |
| US20150000273A1 (en) * | 2013-06-26 | 2015-01-01 | Honeywell International Inc. | Turbocharger with annular rotary bypass valve for the turbine, and catalyst disposed in the bypass channel of the turbine housing |
| US20160237883A1 (en) * | 2015-02-17 | 2016-08-18 | Electro-Motive Diesel, Inc. | Bypass mechanism for an exhaust system |
-
1989
- 1989-03-30 JP JP7972489A patent/JPH02259224A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2856735A1 (en) * | 2003-06-30 | 2004-12-31 | Renault Sa | Internal combustion engine for motor vehicle, has turbo compressor with turbine cover having outlet orifice connected to inlet of catalyst, where catalyst and compressor are fixed on cylinder block by main common support |
| EP1686247A1 (en) * | 2004-12-14 | 2006-08-02 | BorgWarner Inc. | Turbocharger-Catalyst-Arrangement |
| US20120291431A1 (en) * | 2011-05-18 | 2012-11-22 | GM Global Technology Operations LLC | Forced induction and exhaust system |
| US8528327B2 (en) * | 2011-05-18 | 2013-09-10 | GM Global Technology Operations LLC | Forced induction and exhaust system |
| US20150000273A1 (en) * | 2013-06-26 | 2015-01-01 | Honeywell International Inc. | Turbocharger with annular rotary bypass valve for the turbine, and catalyst disposed in the bypass channel of the turbine housing |
| US20160237883A1 (en) * | 2015-02-17 | 2016-08-18 | Electro-Motive Diesel, Inc. | Bypass mechanism for an exhaust system |
| US9638098B2 (en) * | 2015-02-17 | 2017-05-02 | Electro-Motive Diesel, Inc. | Bypass mechanism for an exhaust system |
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